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by Juniper
Product Line: Juniper QFX Series
Product Type: Ethernet Switch Module
Original price $221.00 - Original price $240.00
Original price
$221.00 - $240.00
Current price $221.00
Title: Surplus

Orders typically ship within 1-3 Business days, if you need an item to ship sooner please contact us.

Product Description

The QFX-EM-4Q is a 4 port QSFP+ expansion module designed for the QFX5100-24Q, featuring a switching capacity of 2.56 Tbps/1.44 Bpps and supports both 40GbE QSFP+ and 10GbE SFP+ interfaces, with capacities of 24/32 and 96/104 respectively when utilizing a breakout cable. It is equipped with dual redundant, hot-pluggable power supplies compatible with 110-240 V AC and -36 to -72 V DC power sources, alongside redundant (N+1) hot-pluggable fan modules supporting both front-to-back and back-to-front airflow. The module accommodates up to 288,000 MAC addresses, supports a maximum of 128 link aggregation groups (LAGs) with up to 32 ports per LAG, and is designed for a 19-in server rack, measuring 1.72 x 17.36 x 20.48 in and weighing 21.6 lb.

Key Feature for the QFX-EM-4Q

  • What is the switching capacity of the QFX5100-24Q?
    The switching capacity is 2.56 Tbps/1.44 Bpps.
  • Can the QFX-EM-4Q module support 10GbE SFP+ interfaces?
    Yes, it supports 10GbE SFP+ interfaces, offering 96/104 options with the use of a breakout cable.
  • What are the physical dimensions of the QFX5100-24Q switch?
    Dimensions are 1.72 x 17.36 x 20.48 inches (4.37 x 44.09 x 52.02 cm).
  • How does the QFX5100-24Q manage cooling?
    It utilizes front-to-back and back-to-front cooling with redundant variable-speed fans.
  • What is the power consumption of the QFX5100-24Q?
    The power consumption is AFO/AFI: 161 W.
  • What are the power supply options for this device?
    Dual redundant (1+1) and hot-pluggable power supplies are available, supporting 110-240 V single phase AC and -36 to -72 V DC power.
  • How many MAC addresses can the QFX5100-24Q system support?
    The system supports up to 288,000 MAC addresses.
  • What is the maximum operating altitude of the QFX5100-24Q?
    The maximum operating altitude is up to 2,000 meters (610 m).
  • How are link aggregation groups (LAGs) supported on the QFX5100-24Q?
    It supports up to 128 LAGs with a maximum of 32 ports per LAG.
  • What is the maximum jumbo frame size that the QFX5100-24Q can handle?
    The maximum jumbo frame size is 9,216 bytes.

Product Review

The Juniper QFX-EM-4Q expansion module enhances the QFX5100-24Q switch by adding four QSFP+ ports, supporting a substantial increase in network scalability and performance with a switching capacity of 2.56 Tbps/1.44 Bpps. However, its power consumption at 161W and a weight of 21.6 lb (9.8 kg) might be considerations for environments aiming for high energy efficiency and density. It offers flexible airflow options with front-to-back and back-to-front cooling, dual redundant power supplies, and supports a wide range of operating temperatures and humidity levels, making it versatile for various data center environments.


The Juniper QFX-EM-4Q is a 4-port QSFP+ expansion module designed for the QFX5100-24Q switch, enhancing its connectivity and performance capabilities. This module significantly increases the system's flexibility, allowing for a diverse range of high-speed networking configurations. The QFX-EM-4Q supports a switching capacity of 2.56 Terabits per second (Tbps) and 1.44 Billion packets per second (Bpps), ensuring efficient data handling and transmission across networks. Weighing 21.6 pounds (9.8 kg) with dimensions of 1.72 x 17.36 x 20.48 inches (4.37 x 44.09 x 52.02 cm), this expansion module fits perfectly into a standard 19-inch server rack, making it a seamless addition to existing network infrastructure. Its power consumption is rated at 161 Watts for both air flow optimized (AFO) and air flow inverted (AFI) configurations, indicating efficient energy use for its capabilities. Key hardware features include: - Interface Options: Offers up to 96/104 10GbE SFP+ ports with a breakout cable and 24/32 40GbE QSFP+ ports when equipped with two QFX-EM-4Q modules, providing significant expansion capabilities. - Power Supply and Fan Modules: Equipped with dual redundant (1+1) and hot-pluggable power supplies that support both AC and DC power inputs. Additionally, it features redundant (N+1) and hot-pluggable fan modules, ensuring continuous operation and reliability. - Cooling and Environmental Specifications: Supports both front-to-back and back-to-front cooling options with redundant variable-speed fans, optimizing airflow and reducing power consumption. Operating temperatures range from 32° to 104° F (0° to 40° C), with storage temperatures from -40° to 158° F (-40° to 70° C). It operates effectively up to an altitude of 2,000 meters and maintains operation in relative humidity conditions from 5% to 90% (noncondensing). The module's design includes support for up to 288,000 MAC addresses per system, enabling extensive network segmentation and management. For enhanced network performance, it supports up to 128 link aggregation groups (LAGs) with up to 32 ports per LAG, as well as jumbo frames up to 9,216 bytes, facilitating efficient data processing and transmission over the network. Additional specifications include the option to use 40GbE and 10GbE connections as Virtual Chassis ports, allowing for scalable and flexible network architectures. This capability ensures that the module can meet the demands of growing networks, providing a path for expansion and increased data throughput. In summary, the Juniper QFX-EM-4Q expansion module offers a comprehensive solution for enhancing the connectivity and performance of the QFX5100-24Q switch. With its advanced features and specifications, it is an ideal choice for networks requiring high-speed data transmission, extensive scalability, and reliable operation under various environmental conditions.


Part Number and Manufacturer Juniper QFX-EM-4Q
Description 4-port QSFP+ expansion module compatible with QFX5100-24Q
Switching Capacity 2.56 Terabits per second/1.44 Billion packets per second
Weight 21.6 pounds (9.8 kilograms)
Dimensions (Height x Width x Depth) 1.72 x 17.36 x 20.48 inches (4.37 x 44.09 x 52.02 cm)
Power Consumption AFO/AFI: 161 Watts
Interface Options 10GbE SFP+: 96/104 (using breakout cable), 40GbE QSFP+: 24/32 (using 2 x QFX-EM-4Q)
Compatibility 19-inch server rack
Cooling System Front-to-back and back-to-front airflow; Redundant, variable-speed fans for power efficiency
Power Supply and Fan Modules Dual redundant (1+1), hot-pluggable power supplies; 110-240 V AC; -36 to -72 V DC; Redundant (N+1), hot-pluggable fan modules with front-to-back and back-to-front airflow
MAC Addresses Capacity for 288,000 MAC addresses
Virtual Chassis Ports Support for 40GbE and 10GbE
Operating Temperature Range 32° to 104° Fahrenheit (0° to 40° Celsius)
Storage Temperature Range -40° to 158° Fahrenheit (-40° to 70° Celsius)
Maximum Operating Altitude Up to 2,000 feet (610 meters)
Operating Humidity 5% to 90% (non-condensing)
Non-operating Humidity 0% to 95% (non-condensing)
Link Aggregation Groups (LAGs) Maximum of 128 LAGs
Ports per LAG Up to 32 ports
Maximum Frame Size 9,216 bytes (Jumbo Frame)

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